How are metamorphic rocks formed from granite?

Granite is formed from intrusive bodies of magma. If it is not uplifted and brought to the surface, it may remain buried for long periods of time and new material will form at the surface. read more

Quick Answer. Gneiss is formed from the high-temperature metamorphism of existing igneous rocks, generally granite or diorite. The rocks that form gneiss are exposed to extreme pressures and temperatures of between 600 and 700 degrees Celsius. read more

Granite gneiss can also form through the metamorphism of sedimentary rocks. The end product of their metamorphism is a banded rock with a mineralogical composition like granite. Folded Gneiss: A photograph of polished gneiss from the stock of a countertop vendor. read more